﻿using System;
using System.Configuration;
using System.Web;
using System.Web.Configuration;

namespace Kkbac.Tools.Web.WebConfig
{
    /// <summary>
    /// ConfigurationOperator 的摘要说明
    /// </summary>
    public class ConfigurationOperator : IDisposable
    {
        private Configuration config;
        public ConfigurationOperator()
            : this(HttpContext.Current.Request.ApplicationPath) { }
        public ConfigurationOperator(string path)
        {
            config = WebConfigurationManager.OpenWebConfiguration(path);
        }

        /// <summary>
        /// 设置应用程序配置节点,如果已经存在此节点,则会修改该节点的值,否则添加此节点
        /// </summary>
        /// <param name="key">节点名称</param>
        /// <param name="value">节点值</param>
        public void SetAppSetting(string key, string value)
        {
            var appSetting = (AppSettingsSection)config.GetSection("appSettings");
            if (appSetting.Settings[key] == null)//如果不存在此节点,则添加
            {
                appSetting.Settings.Add(key, value);
            }
            else//如果存在此节点,则修改
            {
                appSetting.Settings[key].Value = value;
            }
        }

        /// <summary> 
        /// 设置数据库连接字符串节点,如果不存在此节点,则会添加此节点及对应的值,存在则修改 
        /// </summary>
        /// <param name="key">节点名称</param>
        /// <param name="connectionString">节点值</param>
        public void SetConnectionString(string key, string connectionString)
        {
            var connectionSetting = (ConnectionStringsSection)config.GetSection("connectionStrings");
            if (connectionSetting.ConnectionStrings[key] == null)//如果不存在此节点,则添加
            {
                var connectionStringSettings = new ConnectionStringSettings(key, connectionString);
                connectionSetting.ConnectionStrings.Add(connectionStringSettings);
            }
            else//如果存在此节点,则修改
            {
                connectionSetting.ConnectionStrings[key].ConnectionString = connectionString;
            }
        }

        /// <summary>
        /// 保存所作的修改
        /// </summary>
        public void Save()
        {
            config.Save();
            config = null;
        }

        public void Dispose()
        {
            if (config != null)
            {
                config.Save();
            }
        }
    }
}
